Ah right, well I didn't consider it because this card only set me back $150
3rd monitor, gpu and dp cable came in under $450 lol. I don't need the latest gear, happy to turn a latest game down a tad if necessary. Not that I have needed to, so far this card runs most things on high. No point over capitalising on what is an old computer now.
I did read that some specific older NVidia cards could do it also. The reason I can only run one card is that my PSU is a 430w Antec and my motherboard only has one PCIe.